DNS over SMS, send a text message to 1(833)672-1001 | Hacker News Reader

DNS over SMS, send a text message to 1(833)672-1001

developers.cloudflare.com

54 pointsrvnx35 comments

Note to those in Canada: although calling a toll-free number is... toll-free... sending an SMS to one may incur you an international (USA) SMS fee per message unfortunately :/

This turned out a big thorn in my side when I, as a Canadian, wanted to make my existing toll-free number hosted with Flowroute then Twilio my primary contact number.

Maybe there's some magic to make the number 'Canadian' such as hosting it with a Canadian provider, but just a heads up that not all toll-free are that when it comes to SMS (even though in this instance you're only likely to try it a couple times) :)

Creator here. I've just added (289) 276-1001 for all our Canadian friends to save you a few cents as opposed to international rates :)

Awesome, thanks!

My pleasure :)

  $ nslookup                                                                                                                                                                                                 
  > set type=TXT
  > dani.cloudflare.com
  Server:  8.8.8.8
  Address: 8.8.8.8#53

  Non-authoritative answer:
  dani.cloudflare.com text = "Dani rocks."

This does not work with domains with hyphens. It seems to think it's part of the record type or stripping it off.

Creator here. I've done some testing myself with domains with hyphens, and it appears to be working for me. I did fix a limited edge case that may have caused issues.

Drop me an e-mail: mgall [at] cloudflare if you can reproduce and I can look again.

Agreed with the parent, I tried to resolve a name in the format:

app.example-foo.com, and got a “no records found for foo.com” error.

It defaults to AAAA records so you may need to type

A app.example-foo.com

it worked for me

All about the future! A records are old school :)

See my addition above - this still seems to be broken.

So in my case, I actually performed an explicit CNAME lookup. The fact that the error message says "We couldn't find any CNAME records for foo.com" tells me that the name parser is still not handling hyphens correctly.

Interesting, I'll take a look.

Not low tech enough. Hopefully they’ll consider pigeon based DNS for those cases when you don’t have cel tower reception: https://en.m.wikipedia.org/wiki/IP_over_Avian_Carriers

Let's not get ahead of ourselves and try with fax and phonebook before.

Creator here. I was actually contemplating DNS-over-Letter, but I couldn't find a great way of handling requests that I could make reasonably safe for people who would have to handle them.

It doesn't have to be people. Have you considered using crabs? https://phys.org/news/2012-04-scientists-crab-powered.html

https://www.clicksend.com/post/concealed-pin-number-letters/ Unless you mean the requests were that hot off the presses it burns the mail carriers hands ;-)

I assume by safe for those handling them his main concerns for DNS via letter would be letter bombs and letters containing toxic substances such as anthrax powder or ricin.

That and I planned to put stickers and stuff in. Asking for return envelopes and addresses seems a little bit terrible :)

Oh I see, People mail in a DNS request and you return it.

> Asking for return envelopes and addresses seems a little bit terrible :)

How else you going to reply with the DNS Record? ;-)

EDIT: Also thanks for the DNS Via SMS service. I've already used it twice for legit reasons. Who would of thought that having an out of band DNS service would be handy.

Maybe the sender can just put the domain in the return address instead of their name. I don't know if the post office really gives a shit

OpenBSD kernel support soon

RFC pending.

Doesn't appear to handle names with dashes

Creator here. I've done some testing myself with domains with hyphens, and it appears to be working for me. I did fix a limited edge case that may have caused issues.

Drop me an e-mail: mgall [at] cloudflare if you can reproduce and I can look again.

I dropped two e-mails, but I don't know if you got them (got no reply).

We tried from three European mobile numbers (France, Luxembourg, Belgium) but it doesn't work.

Creator here. This should now be resolved.

for the US number if from international, are we supposed to include the number between parenthesis [+1(833)672-1001] when dialing ?

If you're texting internationally, it's 0018336721001 :)

Hahaha this is really neat I don't know what I'll use it for but...

So theoretically tunneling over DNS ( iodine ) should work with this too right?

I think iodine uses records that wouldn't fit in a single SMS. I'm not sure whether cloudflare supports splitting records over multiple SMS's...

Creator here. I could probably work something out. Let me have a ponder. mgall [at] cloudflare if you want to try it out.

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